> For the complete documentation index, see [llms.txt](https://tmediadocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability.md).

# Redundancy and High Availability

(Click here for ProSBC High Availability and 1+1)

This page describes the TelcoBridges [VoIP Gateway](https://telcobridges.com/learning/session-border-controller/voip-gateway/) high availability features. TelcoBridges' products are designed with the following two goals in mind:

1. Recover from a system failure and minimize the system down-time and network instability, as much as possible. This is achieved with fault tolerance and redundancy designed into the very architecture of the product.
2. Keep active calls open after a fail-over, whenever possible.

### TelcoBridges High Availability and Redundancy

TelcoBridges high availability and redundancy is comprised of a collection of features. These features enable customers to add as many HA and redundancy fdeatures to their systems as required.

To learn more about high availability and redundancy, see:

* [TMG800 datasheet](https://telcobridges.com/products-tmedia-voip-gateways-tmg800-datasheet/)
* TMG3200 datasheet
* [TMG7800 datasheet](https://telcobridges.com/products-tmedia-voip-gateways-tmg7800-datasheet/)

### Definitions

The following is a list of terms that are used in the description of high availability features:

* [Active Calls](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/active-calls.md)
* [Active/Standby](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/active-standby.md)
* [Load Sharing](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/load-sharing.md)
* [Master/Slave](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/master-slave.md)
* [Primary/Secondary](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary.md)
* [Resynchronization](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/resynchronization.md)
* [Switchover](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/switchover.md)
* [Switchover Period](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/switchover-period.md)
* [Transient Calls](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/transient-calls.md)

### TMG800 Features

* [Power Supply](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/power-supply.md)
* [VoIP Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/network.md#voip-network)
* [Clocking](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/clocking.md)
* [Signaling Protocols](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-protocols.md#tmg800-tmg3200-series)

### TMG3200 Features

* [Power Supply](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/power-supply.md)
* [VoIP Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/network.md#voip-network)
* [OC3/STM-1 Interface](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/tdm-interfaces.md)
* [Clocking](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/clocking.md)
* [Signaling Protocols](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-protocols.md#tmg800-tmg3200-series)

### TMG7800 Features

* [Power Supply](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/power-supply.md)
* [Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/network.md)
  * [VoIP Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/network.md#voip-network)
  * [Control Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/network.md#control-network)
  * [TMS Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/network.md#tms-network)
* [Tdm Interfaces](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/tdm-interfaces.md)
* [Clocking](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/clocking.md)
* [Signaling Protocols](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-protocols.md#tmg7800)
* [TMG-CONTROL](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-tctrl.md)
* [Host redundancy](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/hosts.md)
  * [Hard Disks](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/hosts.md#hard-disk)

## In this section

* [Active Calls](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/active-calls.md)
* [Active/Standby](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/active-standby.md)
* [Clocking](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/clocking.md)
* [Clocking Sources](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/clocking-sources.md)
* [Control Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/control-network.md)
* [Ethernet Bonding](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/ethernet-bonding.md)
* [H.248 Network Redundancy](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/h-248-network-redundancy.md)
* [Hardware:Clocking](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/hardware-clocking.md)
* [Hardware:Tdm Interfaces](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/hardware-tdm-interfaces.md)
* [Hosts](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/hosts.md)
* [Load Sharing](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/load-sharing.md)
* [Master/Slave](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/master-slave.md)
* [N+1](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/n-1.md)
* [Network](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/network.md)
* [Power Supply](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/power-supply.md)
* [Primary/Secondary](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary.md)
* [Resynchronization](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/resynchronization.md)
* [Software:CDR](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-cdr.md)
* [Software:Configuration Database](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-configuration-database.md)
* [Software:H.248](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-h-248.md)
* [Software:Signaling Protocols](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-protocols.md)
* [Software:Signaling Stack:CAS](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-stack-cas.md)
* [Software:Signaling Stack:ISDN](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-stack-isdn.md)
* [Software:Signaling Stack:SIGTRAN](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-stack-sigtran.md)
* [Software:Signaling Stack:SIP](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-stack-sip.md)
* [Software:Signaling Stack:SS7](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-signaling-stack-ss7.md)
* [Software:Tctrl](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/software-tctrl.md)
* [Switchover](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/switchover.md)
* [Switchover Period](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/switchover-period.md)
* [System Id](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/system-id.md)
* [Tdm Interfaces](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/tdm-interfaces.md)
* [Toolpack: CDR Redundancy](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/toolpack-cdr-redundancy.md)
* [Transient Calls](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/transient-calls.md)
* [VoIP Bonding](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/voip-bonding.md)
* [Voip Redundancy](/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/voip-redundancy.md)


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